There is no real substitute in Linux. I can add a fresh out of the box PC to the domain and without touching it again it will be ready for any end-user to begin using in about 30 minutes. Their local account will already be set up and ready to go complete with all windows updates and all company software installed. If they had a PC previously, all their "local" drives, files, and email will be there as soon as they log in. In fact, any user can log into that PC and get access to their email. They can use all their regular software as well so long as they are a member of that dept. I don't have to do anything to that PC other than hook it up and join the domain. I can even move that PC to another dept. and the software and printers available to it will change accordingly without my having to touch 1 setting or manually install one piece of software or driver.

To my knowledge there is nothing in the Linux world that will do all that.